Book section: D’Albis and Boubtane provide empirical evidence on the macroeconomic and fiscal consequences of international migration for OECD countries. The authors use a panel of 19 countries over the period 1980–2015 to study the effects of increases in the net migration rate on per capita GDP and on both the employment rate and the share of working-age in total population. Moreover, the effect of exogenous changes in fiscal balance is studied by decomposing the effects of net taxes and public spending. The empirical evidence is discussed using recent findings of the theoretical literature.